Mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit, preparation method thereof and flexible bending sensor

Abstract

The invention discloses a mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit, a preparation method thereof and a flexible bending sensor, and the preparation method comprises the following steps: taking titanium and carbon as double targets, and generating a mixed coordination metal carbon nano-film by using a microwave plasma double-target magnetron sputtering technology; dispersing the mixed coordination metal carbon nano-film, a polymer preparation and a bipolar material in a water solvent, and carrying out ultrasonic stirring treatment to prepare the mixed coordination metal carbon nano-film hydrogel; then sequentially stacking metal electrodes and I-shaped adhesive tapes on the upper surface and the lower surface of the mixed coordination metal carbon nano-film hydrogel to prepare the mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit. According to the invention, the hydrogel flexible bending sensing unit which is uniform in conductive network, high in sensitivity, stable in working and excellent in performance is manufactured through a simple stirring process, and therefore accurate measurement of external stimulation is achieved.

Description

technical field [0001] The invention relates to the technical field of flexible sensing, in particular to a mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit, a preparation method thereof, and a flexible bending sensor. Background technique [0002] Due to its extremely strong stretchability and biological characteristics that are well compatible with human skin, hydrogel has the potential to be applied to the field of electronic skin smart wear. However, at present, the preparation process of fully dispersing conductive substances such as carbon nanotubes, graphene, and silver nanocrystals in the hydrogel preparation solution to prepare stable and reliable conductive sensors is very complicated and cumbersome, which usually requires oxidation of conductive substances. , and then prepare a uniform conductive network by forming chemical bonds between the oxidized groups and the hydrogel. By mixing the conductive substance with the hydrogel solu...

AI Technical Summary

Problems solved by technology

However, at present, the preparation process of fully dispersing conductive substances such as carbon nanotubes, graphene, and silver nanocrystals in the hydrogel preparation solution to prepare stable and reliable conductive sensors is very complicated and cumbersome, which usually requires oxidation of conductive substances. , and then prepare a uniform conductive network by forming chemical bonds between the oxidized groups and the hydrogel

By mixing conductive substances and hydrogel solutions, and then using simple stirring techniques, it is impossible to obtain a hydrogel sensor with a uniform conductive network, which will lead to a significant decline in the performance of the hydrogel sensor in terms of sensitivity and detection range. This is because the conductive substance Both are hydrophobic, and the conductive substances in the hydrogel preparation solution tend to aggregate rather than uniformly disperse, which makes the prepared hydrogel sensor naturally unable to form a uniform conductive network.

[0003] At present, there is no simple and efficient method to prepare hydrogel sensors with uniform conductive network, which limits the application of hydrogels in the field of smart electronic skin.

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